TISSUE-REMOVING CATHETER WITH IMPROVED ANGULAR TISSUE-REMOVING POSITIONING WITHIN BODY LUMEN

摘要

A tissue -removing catheter for removing tissue from a body lumen includes a tissue-removing element. The tissue -removing element may be coupled to a first longitudinal body portion of the catheter body. The first longitudinal body portion may be rotatable along its length and relative to a second longitudinal body portion to adjust the angular position of the first longitudinal body portion relative to the second longitudinal body portion. An angular-positioning mechanism may be operatively connected to the tissue -removing element for rotating the tissue -removing element relative to the second longitudinal body portion about a rotational axis to adjust an angular tissue-removing position of the tissue -removing element, relative to the longitudinal axis of the body lumen, from a first angular tissue -removing position to a second angular tissue -removing position offset from the first angular tissue -removing position.